Realm of Light

The Realm of Light is made up mostly of light and makes up almost half of the KH universe, similar to the Realm of Darkness. Like the other realms, this one has a Keyblade which chose Sora as it's wielder. Most of the game's worlds are found here. It can be presumed that most of the Worlds accesible by Gummi Ship are either within the Realm of Light, or are related to it, like the Twilight Realms.